1312211220102 has 48 divisors (see below), whose sum is σ = 2852728220160. Its totient is φ = 435926674800.

The previous prime is 1312211220091. The next prime is 1312211220109. The reversal of 1312211220102 is 2010221122131.

1312211220102 is a `hidden beast` number, since 131 + 2 + 211 + 220 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312211220109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43419777 + ... + 43449987.

It is an arithmetic number, because the mean of its divisors is an integer number (59431837920).

Almost surely, 2^{1312211220102} is an apocalyptic number.

1312211220102 is an abundant number, since it is smaller than the sum of its proper divisors (1540517000058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312211220102 is a wasteful number, since it uses less digits than its factorization.

1312211220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38289 (or 38286 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1312211220102 its reverse (2010221122131), we get a palindrome (3322432342233).

The spelling of 1312211220102 in words is "one trillion, three hundred twelve billion, two hundred eleven million, two hundred twenty thousand, one hundred two".